This year’s National SepticSmart Week is September 18-22, 2017. The Environmental Protection Agency (EPA) uses a week in September each year to focus on improved awareness of proper operation and maintenance of septic systems across the United States. The wastewater of approximately 25 percent of the population of the United States is treated by on-site or individual wastewater systems. In Nebraska, this statistic holds consistent with 25 percent of our state’s population being served by onsite wastewater systems on farms, acreages, suburbs and even some small communities.